Without mentioning any names, this document summarises the decision to take of PMOI from the terrorism list. And it indicates (taking into account previous discussions where the UK objected) that most probably the United Kingdom might have abstained when it came to the vote on this matter, showing that despite the decision of the Court the UK would not have been convinced it was wrong.

PS: And just out of curiosity I learnt that the CP 931 Working party is the "Working Party on implementation of Common Position 2001/931/CFSP on the application of specific measures to combat terrorism" (the terms of reference of this working party can be found here).